856160121 has 16 divisors (see below), whose sum is σ = 1214024000. Its totient is φ = 535154688.

The previous prime is 856160117. The next prime is 856160147. The reversal of 856160121 is 121061658.

It is not a de Polignac number, because 856160121 - 2² = 856160117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856160111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71896 + ... + 82953.

It is an arithmetic number, because the mean of its divisors is an integer number (75876500).

Almost surely, 2^856160121 is an apocalyptic number.

It is an amenable number.

856160121 is a deficient number, since it is larger than the sum of its proper divisors (357863879).

856160121 is a wasteful number, since it uses less digits than its factorization.

856160121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154968.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 856160121 is about 29260.2139602567. The cubic root of 856160121 is about 949.5510791247.

The spelling of 856160121 in words is "eight hundred fifty-six million, one hundred sixty thousand, one hundred twenty-one".